Liquid heating and circulating device



Feb. 16, 1932. A. F. WILLAT ET AL 1,845,692

LIQUID HEATING AND CIRCULATING DEVICE Filed Aug. 27, 1931 f iiiilHIlI "*1"!!! ML INVENTORS.

. Arno/d I: 91 17/07 James B. awson MM W ATTORNEY.

Patented Feb. 16, 1932 PATENT OFFICE ARNOLD F. WILLAT, OF SAN RAFAEL, AND JAMES B. DAWSON, OF

SAN rmcrsco,

CALIFORNIA LIQUID HEATING AND CIRCULATING DEVICE Application filed August 27, 1931. Serial a. 559,744.

The invention relates to a device arranged for immersion in a liquid, such as oil or the like, for the purpose of effecting simultaneously the heating and circulation thereof while contained in a storing or other vessel not particularly adaptable for external heat application.

An object of the invention is to provide a device which has combined therein as a single and compact unitary structure, the means for heating the liquid and the means includin the motor for effecting the circulation of the liquid.

Another object of the invention is to provide a device of the character described which may be readily supported on the cover of the vessel with the parts arranged for immersion in the liquid extended through a substantially sealed opening in such cover.

A further object of the invention is to provide a device of the character described in which the bung or cap for sealing the opening in the vessel cover forms a unitary part of the device and serves as the sole means of supporting same in operative position on the cover. I

A still further object of the invention is to provide a device of the character described in which an electric resistance connected in series with the motor for diminishing the speed thereof is associated with the electric element for heating the liquid so that such resistance may be used in substantially the same manner as the element for effecting the heating of the liquid.

The invention possesses other objects and features of advantage, some of which, with the foregoing, will be set forth in the following description of the preferred form of the invention which is illustrated in the drawings accompan ing and forming part of the specification. t is to be understood, however, that variations in the showing made by the said drawings and description may be adopted within the scope of the invention as set forth in the claims.

Referring to said drawings:

Figure 1 is a side elevation of the unit of our invention.

Figure 2 is a transverse sectional view of the device taken through the electric heating element casing, the plane of the section being indicated by the line 22 of Figure 1. igure 3 is a transverse sectional view of the device taken on the line 33 of Figure 1. Figure 4 is a diagrammatic representation of the electrical circuit as used in the device. As illustrated in the drawings the device of our invention is designed for operative positioning on a closed vessel or receptacle no g such as a drum or barrel for oil or the like,

having a suitable top or cover 2 as indicated in dotted lines. The cover as here shown is formed with an opening 3 which is arranged to be sealed with a bung or a cap de- 05 pending on the construction of the vessel cover. In the present embodiment the device is structurally combined with a hung 4 formed of wood and tapered so as to fit tightly within the correspondingly shaped opening 3. The bung is split longitudinally so as to'provide a pair of transversely separable sections or halves 5 and 6 which are arranged to be held together by means of a clamp 7 76 Extending longitudinally through the bung in an opening 8 defined by the two halves 5 and 6 is a tube 9 sealed at the bottom and arranged to contain an electrical heating element core 10 lying lengthwise in the central and lower portion of the tube. The tube is secured at its upper and lower extremities to headers 11 and 12 respectively, and as clearly shown in Figure 1 such headers provide bearings 13 and 14 for a power shaft 16 which extends through the hung in parallel relation with the tube 9 and has affixed to the lower extremity thereof a propeller 17 The upper end of shaft 16 is connected by means of a coupling 18 to a shaft 19 of a motor 21, which is supported on a semi-cylindrical casing or shell 22 extending upwardly from and fixed to the header 11. Attachment of the motor to the shell 22 is preferable by means of the screw bolts 23 which secure the motor parts together and clamp threagainst the perforated ears 24 formed on the shell and arranged to seat within the 1 0 ting ' pressed together at the sideof opening 8 and serving-for the reception of said shaft; The grooveds .rela-i tively large so afforded betweenshaft and the portion of the bung surrounding same. In-"orde'r to retain the shaft free within the groove and at "the same time prevent the rotationof the tubean.

the bung, a guide rod 28 is secured to the head ers and interposed therebetweenein,parallel relation to the shaft and tube. The rod 28 is designed to fit snugly .in: a groove 29 0f thebung and: be firmly locked :therein when-:th e

thereby bung sections are clamped together,

serving toj effectively holdthe tube and: shaft from revolvingtogetherwhen :the device is being operated. suitable ment such as. a coil 31Zmay be positioned on the core- 10 forheating-the liquidinth'e vessel; and in .the present "embodiment iof the inven like is disposed onrthe score'and which, inyaddit ion to serving as a r resistance-element. :for slowing I up the. supplements the=element 311 in: serving in a substantially like heating s capacityas a.- means of :heating the liquid. will thus be clear that *while a resistance 1 is: added to: avoid. the: necessity ofv using expensive motor-winding or a reduction-gear for obtaining a slow :motor or' driving sp eed,2the heat generated in theruse of such tion a :second coil. 32 *or the speed: of the motor;

resistance is utilized practically entirelyxinr effecting the heating :of 'the--liquid, thereby making possible th'G-MSG of asimple and inens pensive motor withoutloss of efficiency. The

resistancecoilas will beseen in the.drawingsis arranged in ser es action.

the motor-,asmaybe desired, :a sw itchf33being arranged in the circuit branchiof: the coil toa allowesucheoptional operation:= As shownain Figure 1, the switch 33is mounted on thesup+ porting'shell 22, and the leadsto and from the switch as; well as those between, the. motor and: coils are; arranged out .ofthe way within. the

shellI To, applyourdeviceto the vessel, it is merely necessary toremove the original bungor cap from the openingvand replacesame with. bung ,4 and associated; parts of the unit... The tube, shaft, .etc., may heathen raisedor. lowered relative to the bungor cover so as the toiimmerse the heating element and propeller the desired depth in the liquid. 7 Upon now forcing the bung down in tight engagement? in; the opening; the bung sections wlll be" and' 'a'gainst the tube and that ample clearance will be type of electric :heating ele with themotor so that when the-motor is operating the coil is: always in Onthe other hand the coil-i81is arranged in. parallel with the motor and :may be-roperated Ior not, during the 5 operation of:

guide rod to firmly lock the entire unit in operative position. When th motor is then turned on with one or both heating elements, the liquid will be heated in an efficient manner while the propeller will effectively circulate the liquid throughout the ent-ire vessel;

To Lremoveath'e unit, it.zis,,merety necessary to loosen the bung and then lift same out of the opening together withthe rest of the unit.

1. Ii 1 a device of the character described, the combination with a cap for covering an opening "n'a vessel,'of a heating element and power. haftladjustably carried thereby and connected together above and below said cap, said; elementibeing held in. the Scapagainst rotation, a DJOllQBzfOI drivingsai-dshaft gunie tarilycarried and. adjustable @therewithiand 1 withlsaid .elementin said cap; and sliquid circulating meanscarriedzby'said shaft beloWz' saidrape 2. In a the iCOIHblIlZIlJlQD avithz. aacap zfor-coveringran openingin: acvesseltop'yof a tube: encased elec;.

tric heating-v element. extending 1 through 5 said .3 cap, .1. a rotatable'i shaft: i extendingv substans.

tiallyi parallel; with said element through; said cap, independent means above and below said-:cap securing saidelementaand shaft :to-

gether and forming abearing for: said shaft,-

azmotor fordrlv.

tion to; the shaft,"- and- :a liquid; :circulatingg means carriedbyasaid shaft underthemezins:

below :the cappsaid shaft together-With said element and propeller being 1 insertible.= and wit-hdrawable with said cap as annitthrough f said opening;

3.111: a combined liquid'heating and cir+= .1105 secured in said support and having its lower vidi'ng a bearing forsaid shaft, amotorear-w ried by the first meansin; axial alignment with the shaft and operatively -coupled--th'ere' to; an electric heating element arrangedwith in said tube and having the conductors'thereefor extending' -from the DOP'lOf the-tube,- and, blades afliired to said shaft below the lower; extremity=of-the-tube.-" V

4:: In a combined-liquid heating and '-cir culating'devicazthe combination with a bungarranged for-vinsertion in; anwopeninggand comprisingtransversely separable sections defining a shore, means for releasably, secure ing saidsections together, a' tube slidably fit; ting-in-=ai1d extending through said bore" and" having its upper and-lower extremities re spectively open and closed, arotatable shaft disposed parallehto-said tube and extending through said bung substantially yvithout en gagement -therew-ithg independent means at ng said shaft carried-by said i means-above -the'cap= and 1n;concentr1c relas device of the character .descri-bed;..

each of said extremities of the tube aflixed thereto and providing bearings for the said shaft, a guide rod aflixed to each of said bearing means and in parallel relation to said tube and slidably fitting in said bung, a motor secured to the upper of said bearing means in spaced relation to the u per end of the tube and with the shaft tlibreof in axial alignment with said first shaft, a coupling connecting said shafts, an electric heat- 1ng element in said tube having the conductors therefor extending through the open end of the tube, an electric switch carried by said upper bearing motor supporting means, and a circulating means afiixed to said first shaft and lying below the lower extremity of the tube.

In testimony whereof, we have hereunto set our hands at Oakland, California, this 24th day of August, 1931.

ARNOLD F. WILLAT. JAMES B. DAWSON. 

